Was hoping one of you folks would know of a program that would be able to sort through a few million images and either arrange them or, add them to a folder if they are longer on the width than they are on the height?

For example, lets say i have a folder that has a bunch of 100x150 and 150x100 thumbnails in it, is there a way i could make that in to two folders, one containing the 100x150 and the other containing the 150x100 thumbs?

Regards,

Lee